Horizontal docking type battery terminal liquid cooling connection device, battery pack and electric vehicle

Abstract

The present invention discloses a horizontal docking type battery terminal liquid cooling connection device, a battery pack and an electric vehicle, which are used to be connected to a liquid supply device of a provided coolant, and include: a mounting seat, which is arranged on the battery pack; and a connecting valve, which is fixed on the mounting seat, wherein one end of the connecting valve is located on the inner side of the battery pack and is connected to the liquid cooling pipeline, and the other end is used to connect to the liquid supply device, and an openable and closable flow channel is formed inside the connecting valve, and the flow direction of the flow channel is parallel to the planar direction of the battery pack, so as to achieve communication with the liquid cooling pipeline of the electric vehicle after the battery pack is horizontally installed on the electric vehicle. According to this solution, in the process of installing the battery pack to the bottom of the electric vehicle, when the battery pack is moved horizontally into position, the battery pack can be installed and the sealed communication between the liquid cooling connection device of the battery pack and the liquid cooling pipeline of the electric vehicle can be achieved, thereby ensuring the sealing and preventing leakage, and the installation and connection process is simple and efficient.

Description

[0001] This application claims priority to Chinese patent application No. 202010981928.8 filed on September 17, 2020. The entire disclosure of the aforementioned patent application is incorporated herein by reference. Technical Field

[0002] The present invention relates to the field of battery replacement for electric vehicles, and in particular to a horizontal docking type battery terminal liquid cooling connection device, a battery pack and an electric vehicle. Background Art

[0003] Currently, electric vehicles primarily obtain energy through charging and battery swapping. Battery swapping allows for rapid energy replenishment, reducing customer wait times and increasing the utilization rate of battery swapping stations. Furthermore, batteries can be centrally charged at night, achieving peak load shaving and energy storage. This improves the overall utilization efficiency of power equipment and extends battery life, making it highly valuable and economically viable for adoption.

[0004] In battery-swap electric vehicles, the replaceable battery pack is generally installed in a removable manner, and the battery pack can be removed and replaced with a new one at any time. The cooling pipe installed on the quick-swap battery pack is connected to the cooling system of the electric vehicle, and the circulation of the coolant is used to achieve thermal balance of the quick-swap battery pack. However, the current quick-swap battery pack and the connector structure on the quick-swap bracket assembly are not liquid-tight due to the locking positioning limitations of the battery pack's locking mechanism, which may cause dripping problems, which will lead to safety hazards such as leakage. Therefore, the design of the liquid cooling connector on the replaceable battery pack is greatly restricted. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above problems and provide a horizontal docking type battery terminal liquid cooling connection device, a battery pack and an electric vehicle.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] The present invention discloses a horizontal docking type battery terminal liquid cooling connection device, which is used to connect to a liquid supply device of a provided coolant, thereby passing the coolant into a liquid cooling pipeline in a battery pack, comprising:

[0008] A mounting base, provided on the battery pack; and

[0009] A connecting valve is fixed on the mounting seat, one end of the connecting valve located on the inner side of the battery pack is connected to the liquid cooling pipeline, and the other end is used to connect to the liquid supply device. An openable and closable flow channel is formed inside the connecting valve, and the flow direction of the flow channel is parallel to the planar direction of the battery pack, so as to achieve communication with the liquid cooling pipeline of the electric vehicle after the battery pack is installed in the electric vehicle in a horizontal direction.

[0010] According to this solution, during the process of installing the battery pack on the bottom of the electric vehicle, when the battery pack is moved horizontally into position, the liquid cooling connection device of the battery pack can be sealed and connected with the liquid cooling pipeline of the electric vehicle while the battery pack is installed, ensuring the sealing and preventing leakage. The installation and connection process is simple and efficient.

[0011] Preferably, the mounting seat is arranged on the top surface or side surface of the battery pack, and the plane direction of the mounting seat is perpendicular to the plane direction of the battery pack and perpendicular to the flow direction.

[0012] According to this solution, by fixing the mounting base in a vertical manner relative to the battery pack and setting the flow direction of the flow channel of the connecting valve perpendicular to the mounting base, that is, the flow direction of the flow channel of the connecting valve is parallel to the horizontal direction of the battery pack, it is possible to achieve a rapid sealed connection between the liquid cooling connection device and the liquid cooling pipeline of the electric vehicle while the battery pack is lifted upward into place.

[0013] Preferably, the battery pack is detachably connected to the bottom of the electric vehicle through a locking device. When the battery pack lifted into place by the bottom of the electric vehicle moves along the length direction of the electric vehicle body until the locking shaft on the battery pack cooperates with the locking groove of the locking device, the liquid supply device of the electric vehicle is connected to the connecting valve and the circulation channel is opened.

[0014] According to this solution, when the battery pack is moved horizontally until the lock shafts on both sides of the battery pack cooperate with the lock grooves of the locking device, that is, the lock shafts of the battery pack are locked in the corresponding lock grooves, the connection valves between the liquid cooling pipeline of the electric vehicle and the battery pack gradually abut from the contact state to the sealed connection and open the flow channel.

[0015] Preferably, a positioning component is provided on the mounting seat, and the liquid supply device and the connecting valve are positioned by the positioning component.

[0016] According to this solution, accurate and rapid docking between the liquid supply device and the connecting valve is achieved through the positioning component.

[0017] Preferably, the positioning component includes two positioning holes or two positioning columns respectively provided on both sides of the connecting valve.

[0018] Preferably, the mounting seat is provided with a sealing ring arranged around the connecting valve.

[0019] According to this solution, a sealing ring is provided on the periphery of the connecting valve to ensure a further sealed connection between the liquid supply device and the liquid cooling connecting device of the battery pack. Even if a slight leakage occurs, it can be ensured that the liquid will not leak out and affect other components.

[0020] Preferably, the connecting valve includes a housing in which the circulation channel is formed, and a valve core that is telescopically movable in the circulation channel to open and close the circulation channel.

[0021] According to this solution, when the liquid supply device is sealed and connected to the connecting valve, the circulation channel can be quickly opened by moving the position of the valve core in the shell. The opening of the circulation channel and the sealing connection are achieved simultaneously to avoid leakage.

[0022] Preferably, the shell has a first end and a second end arranged along the flow direction, the first end is an open structure and the second end is provided with a plurality of through holes, and the flow channel is formed between the open structure and the plurality of through holes.

[0023] Preferably, the valve core includes a core body extending from the first end to the second end, and a valve plug that is telescopically mounted on one end of the core body corresponding to the first end and is used to seal the core body and the shell, and the flow channel is opened or closed by the telescopic movement of the valve plug.

[0024] According to this solution, the position of the core body is kept unchanged in the shell of the connecting valve, and the flow channel between the shell and the core body is opened or closed by moving the valve plug sealed between the end face of the core body and the shell along the axial direction of the core body, thereby ensuring that the flow channel is opened and closed and sealed at the same time.

[0025] Preferably, the end surface of the core is recessed at a predetermined depth position of the first end portion, and a guide structure is provided in an area of ​​the shell that is higher than the end surface of the core.

[0026] According to this solution, while the positioning component outside the connecting valve realizes positioning, the guide structure at the front end of the core body can achieve more precise docking between the connector of the liquid supply device and the connecting valve, thereby improving the sealing connection efficiency.

[0027] Preferably, one end of the valve core is fixedly connected to the second end portion and the other end is telescopically connected to the second end portion in the circulation channel, and the valve core is sealed to the first end portion.

[0028] According to this solution, in the connecting valve housing, the flow channel is opened or closed by setting the valve core with one end sealed with the housing to be telescopically movable relative to the housing, thereby ensuring that the flow channel is opened and closed and sealed at the same time.

[0029] The present invention also discloses a battery pack, comprising the horizontal docking type battery terminal liquid cooling connection device described in any of the above solutions.

[0030] Preferably, the number of the horizontal docking type battery terminal liquid cooling connection devices is two, one of which serves as the input part of the cooling liquid and the other serves as the output part of the cooling liquid.

[0031] Preferably, the two horizontal docking type battery terminal liquid cooling connection devices are respectively arranged at opposite ends of the battery pack.

[0032] According to this solution, the input and output parts of the liquid cooling connection device are provided at both ends of the battery pack, which can optimize the layout of the liquid cooling pipeline in the battery pack, reduce the space occupied by the liquid cooling pipeline, and improve the heat exchange efficiency.

[0033] The present invention also discloses a battery pack, including the battery pack described in any of the above solutions.

[0034] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0035] The positive progressive effect of the present invention is that: the present invention ensures that the battery-end electrical connector and the vehicle-end electrical connector are installed between the battery pack and the battery accommodating cavity of the electric vehicle, thereby ensuring that the two are not easily affected by the external environment when electrically connected, thereby ensuring that the battery pack can stably provide power for the electric vehicle; in addition, in conjunction with the hanging parts, the installation of the battery pack is more stable, and in conjunction with the liquid cooling connection device, the temperature of the battery pack can be better controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of the structure of the liquid cooling connection assembly in Example 1 of the present invention;

[0037] Figure 2 Schematic diagram of the structure of the first liquid cooling connection device in Example 1 of the present invention;

[0038] Figure 3 Schematic diagram of the structure of the second liquid cooling connection device in Example 1 of the present invention;

[0039] Figure 4 A schematic diagram of an installation method of the horizontal docking type battery terminal liquid cooling connection device according to Example 2 of the present invention on a battery pack;

[0040] Figure 5Schematic diagram of the structure of the liquid cooling connection assembly connected to the battery pack according to Example 2 of the present invention. DETAILED DESCRIPTION

[0041] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0042] Example 1

[0043] like Figures 1 to 3 As shown, this embodiment 1 discloses a liquid cooling connection assembly 5000, which is used between a liquid supply device and a liquid cooling pipeline. The liquid cooling connection assembly 5000 is used to achieve communication between the liquid supply device and the liquid cooling pipeline, allowing the coolant in the liquid supply device to flow into the liquid cooling pipeline and flow back into the liquid supply device, thereby achieving heat exchange in the area where the liquid cooling pipeline is set.

[0044] Specifically, the liquid cooling connection assembly 5000 includes a first liquid cooling connection device 5100 and a second liquid cooling connection device 5200. The first liquid cooling connection device 5100 and the second liquid cooling connection device 5200 are used in conjunction with each other. One of them is configured as a connection joint of the liquid supply device, and the other is configured as a connection joint of the liquid cooling pipeline. The liquid cooling connection assembly 5000 realizes a sealed connection while realizing the conduction of the liquid cooling pipeline, thereby allowing the coolant to circulate.

[0045] like Figure 1 and 2 As shown, the first liquid-cooling connection device 5100 includes a first mounting seat 5110 and a first connection valve 5120 .

[0046] like Figure 1 and 3 As shown, the second liquid-cooling connection device 5200 includes a second mounting seat 5210 and a second connection valve 5220 .

[0047] The first mounting seat 5110 is a planar plate-like structure, specifically a rectangular structure, and is used to mount and fix the first connecting valve 5120 .

[0048] The first connecting valve 5120 is fixed on the first mounting seat 5110 . An openable and closable flow channel is formed inside the first connecting valve 5120 . The flow direction of the flow channel is perpendicular to the plane direction of the first mounting seat 5110 .

[0049] The second mounting seat 5210 is a planar plate-like structure, specifically a rectangular structure, and is used to mount and fix the second connecting valve 5220 .

[0050] The second connecting valve 5220 is fixed on the second mounting seat 5210 . An openable and closable flow channel is formed inside the second connecting valve 5220 . The flow direction of the flow channel is perpendicular to the plane direction of the second mounting seat 5210 .

[0051] In actual use, one end of the first connecting valve 5120 is connected to the liquid cooling pipeline, and one end of the second connecting valve 5220 is connected to the liquid supply device. Through the coordinated connection of the first connecting valve 5120 and the second connecting valve 5220, the circulation channels in the first connecting valve 5120 and the second connecting valve 5220 are opened at the same time to enable the coolant in the liquid supply device to flow into the liquid cooling pipeline.

[0052] like Figure 2 As shown, the first connecting valve 5120 includes a first housing 5121 with a circulation channel formed therein and a first valve core 5122 that is telescopically movable in the circulation channel to open and close the circulation channel.

[0053] The first shell 5121 is an aerial structure having a first end and a second end arranged along the flow direction. The first end is an open structure and a plurality of through holes are provided on the second end. A flow channel is formed between the open structure and the plurality of through holes.

[0054] The first valve core 5122 includes a first core body 5122a extending from the first end to the second end of the first shell 5121, and a valve plug 5122b that is telescopically movable and is mounted on the end of the first core body 5122a corresponding to the first end and is used to seal the first core body 5122a and the first shell 5121. The flow channel is opened or closed by the telescopic movement of the valve plug 5122b.

[0055] like Figure 3 As shown, the second connecting valve 5220 includes a second housing 5221 with a circulation channel formed therein and a second valve core 5222 that is telescopically movable in the circulation channel to open and close the circulation channel.

[0056] The second shell 5221 is an aerial structure, and the outer diameter of the second shell 5221 matches the inner diameter of the first shell 5121. The second shell 5221 also has a first end and a second end arranged along the flow direction. The first end is an open structure and the second end is provided with multiple through holes. A flow channel is formed between the open structure and the multiple through holes.

[0057] One end of the second valve core 5222 is fixedly connected to the first end of the second shell 5221 and the other end is telescopically connected to the second end of the second shell 5221 in the circulation channel. The second valve core 5222 is sealed to the first end, and the corresponding circulation channel is opened or closed by the telescopic movement of the second valve core 5222.

[0058] Another example Figure 2As shown, the first mounting seat 5110 is provided with a first positioning component 5130, as shown in FIG. Figure 3 As shown, the second mounting base 5210 is provided with a second positioning member 5230. When the first liquid-cooling connection device 5100 is connected to the second liquid-cooling connection device 5200, the first positioning member 5130 and the second positioning member 5230 are used for positioning, ensuring connection accuracy and improving connection efficiency. Specifically, the first positioning member 5130 can be configured as two positioning holes respectively provided on either side of the first connecting valve 5120, and the second positioning member 5230 can be configured as two positioning posts respectively provided on either side of the second connecting valve 5220. Alternatively, the first positioning member 5130 and the second positioning member 5230 can be configured in the opposite manner, or other positioning structures can be used to meet positioning requirements.

[0059] Another example Figure 2 As shown, the end face of the first core 5122a is recessed at a predetermined depth relative to the first end face of the first end portion, and a guide structure is provided in the area of ​​the first housing 5121 that is higher than the end face of the first core 5122a. The guide structure may be a guide slope, or, of course, any other structure having a guiding function. Thus, while the first positioning member 5130 and the second positioning member 5230 are positioned, the guide structure at the front end of the first core 5122a enables more precise docking of the second connecting valve 5220 with the first connecting valve 5120, thereby improving the sealing connection efficiency.

[0060] When the first connecting valve 5120 is connected to the second connecting valve 5220, the edge of the second shell 5221 pushes the valve plug 5122b of the first valve core 5122 to make the valve plug 5122b retract inward relative to the first core 5122a, and at the same time, the first core 5122a pushes the second valve core 5222 to make the second valve core 5222 retract toward the interior of the second shell 5221, so that the flow channels of the first shell 5121 and the second shell 5221 are opened at the same time, and since the second shell 5221 is inserted into the first shell 5121, the first shell 5121 and the second shell 5221 are sealed.

[0061] like Figure 3 As shown, the second mounting seat 521 is further provided with a sealing ring 5240 arranged around the second connecting valve 5220. After the first connecting valve 5120 and the second connecting valve 5220 are connected, the sealing ring 5240 is squeezed to maintain a sealed connection between the first mounting seat 5110 and the second mounting seat 5210, thereby ensuring the sealing of the first connecting valve 5120 and the second connecting valve 5220. In this way, even if a slight leakage occurs, it can be ensured that the liquid will not leak out and cause a threat or impact on other components in the use environment.

[0062] According to the liquid-cooling connection assembly 5000 of this embodiment 1, the mating connection of the first liquid-cooling connection device 5100 and the second liquid-cooling connection device 5200 ensures the openable and closable connectivity and sealing of the flow channel, thus preventing risks such as coolant leakage. The liquid-cooling connection assembly 5000 can be used in all environments where liquid cooling pipelines are connected, such as the pipeline connection between the battery pack and the liquid supply device of an electric vehicle.

[0063] In another embodiment, the sealing ring can also be set on the first mounting seat to achieve a sealed connection. It can be set arbitrarily according to actual needs.

[0064] Example 2

[0065] like Figure 4 and Figure 5 As shown, this embodiment 2 discloses another battery pack 6000, which is used in an electric vehicle to provide power to the electric vehicle. Furthermore, this battery pack 6000 includes a first liquid-cooling connection device 5100 or a second liquid-cooling connection device 5200 of the structure described in the aforementioned embodiment 5. The first liquid-cooling connection device 5100 or the second liquid-cooling connection device 5200 is provided on the battery pack 6000 as a horizontal docking battery terminal liquid-cooling connection device. In this horizontal docking battery terminal liquid-cooling connection device, the first mounting seat 5110 and the second mounting seat 5210, as well as the first connecting valve 5120 and the second connecting valve 5220, are collectively referred to as the mounting seat and the connecting valve.

[0066] When the battery pack 6000 is installed on an electric vehicle, the horizontal docking battery terminal liquid cooling connection device is connected to the liquid supply device on the electric vehicle that provides coolant, thereby passing the coolant into the liquid cooling pipeline within the battery pack 6000 to facilitate heat exchange with the battery modules in the battery pack 6000 during the charging and discharging process, thereby providing a suitable operating temperature environment for the battery pack 6000. Here, the liquid supply device on the electric vehicle is connected to the second liquid cooling connection device 5200 or the first liquid cooling connection device 5100 via the liquid cooling pipeline, which matches the horizontal docking battery terminal liquid cooling connection device on the battery pack 6000. In other words, the first liquid cooling connection device 5100 or the second liquid cooling connection device 5200 is connected between the battery pack 6000 and the electric vehicle, respectively, and the two can be arranged interchangeably.

[0067] Specifically, the mounting seat is provided on the top or side surface of the battery pack 6000, and the connecting valve is fixed to the mounting seat. The plane direction of the mounting seat is perpendicular to the plane direction of the battery pack 6000, and the plane direction of the mounting seat is perpendicular to the flow direction. In other words, the flow direction of the flow channel is parallel to the plane direction of the battery pack 6000, so that after the battery pack 6000 is installed in the electric vehicle in a horizontal direction, it can be connected to the liquid cooling pipeline of the electric vehicle. One end of the connecting valve is located on the inside of the battery pack 6000 and is connected to the liquid cooling pipeline in the battery pack 6000, and the other end is used to connect to the liquid supply device. The liquid supply device here refers to the liquid supply device that provides coolant in the electric vehicle or the liquid supply device installed on the battery charging rack.

[0068] Here, battery pack 6000 is removably connected to the bottom of the electric vehicle via a locking device. The locking device includes a locking mechanism with an L-shaped locking slot and multiple locking shafts positioned on either side of battery pack 6000. Battery pack 6000 is lifted from the bottom of the electric vehicle into position and then moved along the length of the vehicle body, i.e., vertically and horizontally along the direction of the L-shaped locking slot, until the locking shaft on battery pack 6000 engages with the locking slot of the locking mechanism, effectively locking battery pack 6000. When battery pack 6000 is lifted vertically into position, the horizontal docking battery terminal liquid cooling connection device is aligned with the electric vehicle's liquid supply device. As battery pack 6000 moves horizontally, the connection device of the liquid cooling line of the electric vehicle's liquid supply device connects with the connection valve on battery pack 6000, opening the flow channel of the connection valve.

[0069] According to the battery pack 6000 of the second embodiment, during the process of installing the battery pack 6000 on the bottom of the electric vehicle, after the battery pack 6000 is lifted vertically into place, as the battery pack 6000 continues to move horizontally, the liquid cooling connection device on the liquid supply device of the electric vehicle and the connection valve of the battery pack 6000 gradually abut against each other from the initial contact state to a sealed connection and open the flow channel. This allows the battery pack 6000 to be installed and at the same time achieve sealed communication of the liquid cooling pipeline, making the installation and connection process simple and efficient.

[0070] According to the solution of the second embodiment, by fixing the mounting base in a vertical manner relative to the battery pack 6000, and setting the flow direction of the flow channel of the connecting valve perpendicular to the mounting base, that is, the flow direction of the flow channel of the connecting valve is parallel to the horizontal direction of the battery pack 6000, it is possible to achieve a rapid sealed connection between the liquid cooling connection device and the liquid cooling pipeline of the electric vehicle while the battery pack 6000 is lifted into place.

[0071] In another embodiment, the battery pack 6000 has all the features of the above-mentioned embodiments, and further has: the number of horizontal docking type battery terminal liquid cooling connection devices is two, one of which serves as the input part of the coolant, and the other serves as the output part of the coolant. By setting the input part and the output part of the liquid cooling connection device separately, the liquid cooling pipeline arrangement inside the battery pack 6000 is made more flexible. Preferably, the two horizontal docking type battery terminal liquid cooling connection devices are respectively arranged at opposite ends of the battery pack 6000. Providing the input part and the output part of the liquid cooling connection device at both ends of the battery pack 6000 can optimize the layout of the liquid cooling pipeline in the battery pack 6000, reduce the space occupied by the liquid cooling pipeline, and improve the heat exchange efficiency.

[0072] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A horizontal docking battery terminal liquid cooling connection device, used to connect to a liquid supply device for a provided coolant, thereby passing the coolant into the liquid cooling pipeline in the battery pack, characterized in that: include: A mounting seat, provided on the battery pack; as well as a connecting valve fixed to the mounting base, wherein one end of the connecting valve located inside the battery pack is connected to the liquid cooling pipeline, and the other end is used to connect to the liquid supply device. An openable and closable flow channel is formed inside the connecting valve, and the flow direction of the flow channel is parallel to the planar direction of the battery pack, so as to achieve communication with the liquid cooling pipeline of the electric vehicle after the battery pack is mounted in a horizontal direction on the electric vehicle; The connecting valve includes a housing with the circulation channel formed therein and a valve core that is telescopically movable in the circulation channel to open and close the circulation channel; The shell has a first end and a second end arranged along the flow direction, the valve core includes a core body extending from the first end to the second end, the end face of the core body is recessed at a predetermined depth position of the first end, and a guide structure is provided in the area of ​​the shell that is higher than the end face of the core body.

2. The horizontal docking type battery terminal liquid cooling connection device according to claim 1, characterized in that: The mounting seat is arranged on the top surface or the side surface of the battery pack, and the plane direction of the mounting seat is perpendicular to the plane direction of the battery pack and perpendicular to the flow direction.

3. The horizontal docking battery terminal liquid cooling connection device according to claim 1, characterized in that: The battery pack is detachably connected to the bottom of the electric vehicle via a locking device. When the battery pack lifted into position from the bottom of the electric vehicle moves along the length of the electric vehicle body until the locking shaft on the battery pack engages with the locking groove of the locking device, the liquid supply device of the electric vehicle is connected to the connecting valve and the circulation channel is opened.

4. The horizontal docking battery terminal liquid cooling connection device according to claim 1, characterized in that: The mounting seat is provided with a positioning component, and the liquid supply device and the connecting valve are positioned by the positioning component.

5. The horizontal docking type battery terminal liquid cooling connection device according to claim 4, characterized in that: The positioning component includes two positioning holes or two positioning columns respectively arranged on both sides of the connecting valve.

6. The horizontal docking battery terminal liquid cooling connection device according to claim 1, characterized in that: The mounting seat is provided with a sealing ring arranged around the connecting valve.

7. The horizontal docking battery terminal liquid cooling connection device according to claim 1, characterized in that: The first end portion is an open structure and a plurality of through holes are provided on the second end portion. The flow channel is formed between the open structure and the plurality of through holes.

8. The horizontal docking type battery terminal liquid cooling connection device according to claim 7, characterized in that: The valve core also includes a valve plug which is telescopically mounted on one end of the core body corresponding to the first end and is used to seal the core body and the housing. The flow channel is opened or closed by the telescopic movement of the valve plug.

9. The horizontal docking type battery terminal liquid cooling connection device according to claim 7, characterized in that: One end of the valve core is fixedly connected to the second end portion, and the other end is telescopically connected to the second end portion in the circulation channel. The valve core is sealed to the first end portion.

10. A battery pack, characterized in that: It comprises a horizontal docking type battery terminal liquid cooling connection device as described in any one of claims 1 to 9.

11. The battery pack according to claim 10, wherein: There are two horizontal docking battery terminal liquid cooling connection devices, one of which serves as the input part of the cooling liquid and the other serves as the output part of the cooling liquid.

12. The battery pack according to claim 11, wherein: The two horizontal docking type battery terminal liquid cooling connection devices are respectively arranged at the opposite ends of the battery pack.

13. An electric vehicle, characterized in that: Comprising the battery pack as claimed in claim 11 or 12.

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